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Full text of "The manufacture and properties of iron and steel"

INFLUENCE 01 CERTAIN ELEMENTS ON.STEEL.
387
machine. In the acid steels there are 12 groups containing less than 5 heats each. In 7 of these the calculated strength agrees with the actual strength within 1500 pounds. In 5 groups the difference
TABLE XVII-Y.
Comparison of the Actual Ultimate Strength of Certain Groups of Steel with the Strength as Calculated from the Following Formulae:
.  Acid steel: 40000 +1000 0 +1000 P + x Mn=ultimate strength. Basic steel: 41500+770 0 +1000 P + y Mn == ultimate strength.
Value of x as per Table XVII-R; value of y as per Table XVII-V. Italic type denote that the difference between the actual and calculated strengths is over 1500 pounds.
Limits of carbon ; per cent.	Limits of manganese ; per cent.	H-.gJg Number of heats.	Chemical composition ; per cent.			Ultimate strength ; pounds per square inch.		
			a 1 o	Phosphorus.	Manganese.	Actual records.	By formula.	1  P
Acid steel : 0.075 to 0.124	0.30 to 0.39 0.40 to 0.49 0.50 to 0.59		0.1095 0.1131 0.1130	0.0517 0.0566 0,0440	0.361 0.432 0.500	57217 58414--56745	56120 57268 56600	-1097 -1156 -145
0.125 to 0.174	0.30 to 0.39 0.40 to 0.49 0.50 to 0.59	21 96 14	0.1352 0.1466 0.1608	0.0542 0.0567 0.0601	0.377 0.440 0.513	59285 . 60954 64253	58940) 60794 i. 63536  '	-345 -160 \   -717
0.175 to 0.224	0.40 to 0.49 0.50 to 0.59	39 19	0.2011 0.1960	0.0577 0.0579	0.449 0.527	66698 67035	.   66664 67371	Nd|-
0.225 to 0.274	0.30 to. 0.39 0.40 to 0.49 0.50 to 0.59	1 11 10 14 32 3 i	0.2340 0.2520 0.2413	0.0550 0.0576 0.0551	0.390 0.462 0.519	68460 71068 70602	68900 72200 71925	+440 +1132 +1323
0.275 to 0.324	0.40 to 0.49 0.50 to 0.59 0,60 to o.tx) 0.70 to 0.79		0.3093 0,3066 0.2863 0.3240	0.0446 0.0485 0.0497 0.0360	0.469 0.541 0.613 0.720	78200 79167 80333 84100	77101 78950 784Sb 86320	1099 -217 7767 +2220
0.325 to 0.374	030 to ojg 0.40 to 0.49 0.50 to 0.59 0.60 to 0.69 0.70 to 0.79	i 22 80 16 1	ojtyo 0.3452 0.3512 0.3516 0.3440	0.0340 0.0446 0.0472 0.0472 0.0450	0300 0.455 0.544 0.619 0.700	81650 80208 83425 85258 86840	78300 80498 83872 86012 87180	3350 +290 +447 +754 +340
0.375 to 0.424	0.40 to 0.49 0.50 to 0.59 0.60 to 0.69	34 63 6	0.4009 0.3996 0.3993	0.0377 0.0410 0.0425	0.464 0.537 0.622	85205 87880 90598	85908 88444 91284	+703 +564 +686-
0.425 to 0.474	0.40 to 0.49 0.50 to 0.59 0.60 to 0.69	27 53 6 1 12 25 4 6 2	0.4481 0.4515 0.4332	0.0363 0.0382 ' 0.0378	0.462 0.539] 0.617	90950 93760 93805	90672 93974 94587	278 +214 +782
0.475 to 0.524	0.30 to 0.39 0.40 to 0.49 0.50 to 0.59 0.60 to 0,69		0.4770 0.4955 0.4961 6.jwo	0.0330 0.0340 0.0376 0.0305	0.380 0.468 0.533 0.677	90775 95745 98699 104.55	91000 95643 98637 102430	+225 -102 -62 ,2720
0.525 to 0.574	0.40 to 0.49 0.50 to 0.59		0.5463 0.5490	0.0303 0.0505	0.478 0.545	100718 107230	101061 .106330	+343 -900
0.575 to 0.624	0.40 to 0.49 0.50 to 0.59 0.60 to 0.69	4 i \	0.5887	0.0312 0.0430 0.0300	0.462 0.510 0.600	105131 112760 111100	104904 707077 110860	-227